public class EncryptAndDecrypt {
	String encrypt(String sourceString,String password){
		char [] p=password.toCharArray();
	int n=p.length;
	char [] c=sourceString.toCharArray();
	int m=c.length;
	for(int k=0;k<m;k++){
		int mima=c[k]+p[k%n];
		c[k]=(char)mima;
	}
	return new String(c);
}
String decrypt(String sourceString,String password) {
	char [] p=password.toCharArray();
	int n= p.length;
        char [] c=sourceString.toCharArray();
        int m=c.length;
	 for(int k=0;k<m;k++){
                int mima=c[k]-p[k%n];
                c[k]=(char)mima;
        }
        return new String(c);
}}

